Watchman&#39;s service



March 17. 1925.

D. R. MIDDLETON WATCHMANS SERVICE Fil ed March 16, 1922 Patented Mar. 17, 1925.

UNITED STATES DONALD RNInnLEroN, or nnrno'In rr ronreAN, AssIeNon 'ro Aern mm ELECTRIC COMPANY, or CHICAGO, ILLINOIS, A ooR oR TIoN or ILLINoIs.

wA'roHMANs senate.

Application filed March 16, 1922. Serial N6; 544,308.

To all whom it may concern: Be it known that I, DONALD R: hlIDDLE TON, a citizen of the United States of America, and a resident of Detroit, Wayne County, and State of Michigan, have invented certain new and useful Improvements in W atchmens Service, of which the following is a specification.

This invention relates in general to an improved system ofwatchmans service and more specifically to an improved method of supervising the rounds and reports of a watchman in a large plant or' company by means operated by and controlled over the lines of a local or private automatic telephone system.

Among the objects of this invention are to provide an efiicient andinexpensive system of watchmans service which accurately records the time and place of a watchmans report and also allows the rounds of the watchman to be varied at will. Other objects are to provide a tone which informs the watchman that he has'diale'd the proper number to record the call, and to so arrange the system that should any telephone allotted for the watchmans rounds be used for a regular call after working hours bysome person working overtime, the using of said telephone for said call would not cause false recording on the watchmans chart.

There are other objects which together with the above will be described hereinafter, reference being hadyto' the accompanying drawing in which sufficient of the apparatus in an automatic telephone system is shown to enable the invention to be explained and understood. v Referring to the drawing, the reference character A indicates an automatic telephone substation of the ordinary type having the usual calling device S for controlling the automatic switches at the exchange. The reference character C indicates a lineswitch individual to substation A and which is of the well known rotary type in which the wipers have no normal position and move-in a forward direction only. In a system of this sizethere are usually from to 100 telephones or substations each one of which has an individual line switch. The

line switches have common access to a group of 10 or more connectors, one-of which. is indicatedaby the reference character latter 'switchesare' of'the well known Strew= ger vertical and rotary type and have access 5 through their bank multiples to all of the substations. v

To the right of the connectorli are shown a portion of the connector bank multiples of number 0O The private normal, insteadof being multipled from connje'ctorbank to connecto-r bank in the usual manner, is cut at each connector bank aiidan individual lead, such as conductor 33 for instance, 1s run from the test contact -or private normal: of

number. 00 in each connector 'bankto the banks of the rotary line switches, where they are multipled in the same manner as are the other trunk conductors. A relay, relay 76in this instance, is bridgedacross the line bank multiples of number 00 in place of the customar'yline switch and substation which ordinarily would be allotted to that number. The number .00 in this instance, has been set aside as the-code num ber for the night watchman for recording his rounds. V

The reference character 3V, indicates a time recording clock which maybe of the Holtzer Cabot magneto type having a chart that revolves'oncein every hours- The chart is cut up in sections representing the timeby radial lines and is also provided with as many concentric Icircles' as there are watchmans stations in the factory; Thus each iivatchn'ians station is provided with a 1 circular space on the chart for re'cording'the calls, designatedO1, 22?, etc., which numbers correspond to the numbersot the telephones to be used by the watchman on his ground. vIndividual magnets are provided at'thetime recording clock foreach' watchmans station and each magnet is allot-ted to one of the circular spaces. Each magnet has an individual lead, such as conductor 70, which is individual tothe line I switch allotted to the corresponding telei phone station, and each magnet has an armature adapted to mark the time on the chart in its own circular space. 'For instance, when the magnet 71 isen'rgized by. the night watchman by his calling the number 00 from the telephone #01, or substation A, the armature of said magnet is operated'to prick the chart intliecircular space 01011 the radial line representing the same time. that the call was made; I

stations by. the night watchman in a manner The other magnets I are operated fromtheir-respectivetelephone 4Q. switching relay 14 is not short circuited and the stepping magnet is not operated because of the high resistance of said switching relay.

- v similar to magnet 71.

As it is not necessary that. every telephone in the factory be'used as a watchmans station only certain speciwill now proceed to point out more. in,.de-J tall the novel features of the invention by fied telephones in different parts of tory are wired asillustrated.

Having described the apparatus the facbriefly I explaining the operation thereof. For this purpose itwill be assumed that the night watchman ii making one of his rounds v reaches telephone #01 shown at A in the accompanying drawlng. When the receiver is removed at the calling station A a circuit is completed over the conductors 11 and 12' for the line relay 15 of the line switch C. Upon' energizing, relay 15 closes a circuit at its armature 18 which includes the. windmgof the switchlng relay 14 andv the stepping magnet 16 in series, and at 1ts armature 17 connects the test wiper 24 to the abovecircuit at a point midway between the switching relay and the stepping magnet. The operation now depends upon whether thetrunk line with which the'line.

switch wipers are associated is busy or idle.

If the'trunk line is busy there is a ground 1 potential upon the test contact with which in search of an idle trunk line.

we may assume in the present case that when" the testwiper '24 is in engagementythe switching'relay 14 is short circuitedz, and

the stepping magnet 16, which interrupts its own circuit, is operated in the manner of a. buzzer to advance the switch wipers However,

the call is initiated the trunk line upon which the wipers ofthe line switch are standing is-idle. Under these circumstances when the line relay 15 is energized the The latter "relay, however. is. energized.

lVhen the switching relay"l4 is energized, the test w1perx24 1s grounded at armature .7 21, the circuit for the time clock is prepared closed contactsof the reversing relay 34 of connector H to the upper and lower windings of the double wound line relay 35." The line relay 35 is immediately energized and itsarnlature 47 andit's working contact an energizing circuit for the slow acting release'relay 36 is completed. The latter relay preparest-he connector switch H for the vertical operation and'grounds the release trunk conductor 31in order to guard the trunk against. intrusion and also to hold the line-switch C in its operated position, a

V The: watchman may now operate: the call 7 2, armature around armature is closed.

mi fnber or 0. As a result the line relay 35 is deenergized 10 times. line relay 35 deenergizes armature 47 sends an impulse of current to'the' Vertical magnet 42 in series with the slow'acting relay 8? by way of the following circuit: From ground through arm'ature47 and its resting contact armature 49 and its working contact, off normal spring 73, off normal spring 71, winding of'relay 37, and fwlndin device for the first digit of his code Each time the ing of vertical magnet 42 to battery. ,By

the operation of the vertical magnet the wipers 64-66 inclusive, are raised stepv by step until they stand opposite the tenth level of bank contacts. It is in this level that the code number .00 terminates. The slow acting series relay 37 is energized in. series with the vertical'magnet and by means of its armature 50 the. circuit of the vertical magnet is maintainedintact after the operation of the. off normal springs,,whicl1- are operated at the first-vertical step. At the end of the vertical movement theslow acting relay 37 is ,deenergized and the operating circuit is transferred to the rotary magnet'43. i

' The watchman will v device in accordance with the last digit 0 of the code number. When the calling device is" operatedthe line relay 35 isagain deenergized ten times, and'the rotary magnet 4 3"is operated a corresponding number of times .over the following circuit: From ground by the way of armature 47 and its resting now operate the calling I contact, armature 49 and its working contact, off normal spring 73, off normal spring 50 and its resting contact, resting contact of armature 55 "and. said armature, armature 62 and itsresting contact, and rotary magnet 43 'to battery. By the operation of the rotary magnet the wipers 6466 inclusive, are rotated step by step until they come to rest on the tenth set of contacts in the level opposite which they were raised. These bank contacts are indicated in the drawing by the numerals 6769 inclusive, and are the bank contacts .of the code number 00. The slow acting relay 40 is energized in multiple with the rotary magnet and maintains its armatures attracted throughout the rotary movement. At armature" 57 the test relay 39 is connected with the test wiper 65, and at armature 58 a shunt The latter operation is to prevent the test relay ,"from opening the rotary magnet circuit while the test wiper is passing over busy. test concontacts. The slowacting relay 40 is deenergized after the rotary movement and a circuit for the switching relay 41'is completed at armature 57 as follows: I From .groundby the way of armature 48 and its and its resting. contact, upper Winding: of

said switching relay 41, resting contact of armature 57 and said armature, test wiper 65, test contact 68, conductor 33, rotary line switch bank contact 27, wiper 23, working contact of armature 20 and said armature, conductor 70, winding of clock magnet 71, conductor 72, and the working contact of armature 73 and said armature to battery. It is optional whether the clock magnet 71 energizes in series with the switching relay or not, as the switching relay, when it energizes, grounds the test wiper 65 at its armature and its working contact which in turn causes the clock magnet 71 to operate and prick the chart as formerly explained. lVhen the switching relay 41 energizes, it establishes a locking circuit for itself at armature 61, grounds the test wiper at armature 60 as stated, opens the circuit for the rotary magnet 43 at armature 62, and at armature 59 and 63 completes the connection to the line wipers 64 and 66.

The desired connection has now been completed and the ring cut off relay 38 is immediately energized as follows: From either grounded generator and working contact of armature 81 and said armature, or booster battery and resting contact of armature 81 and said armature, resting contact of armature 53 and said armature, armature 63 and its working contact, line wiper 66, bank contact 69, conductor 79, winding of relay 76,

conductor 80, bank contact 67 line Wiper 64, working contact of armature 59 and said armature, armature 51 and 1ts resting contact, and upper winding of ring out off relay 38 to battery. Relay 38 at armature 52 locks itself to grounded release conductor 31, at the resting contacts of armatures 51 and 53 breaks the generator circuit, and at the working contacts of armatures 51 and 53 completes an energizing circuit for relays 76 and 34 as follows: From grounded release conductor 31, working contact of armature 52 and said armature, lower winding of relay 34 working contact of armature 53 and said armature, armature 63 and its working contact, wiper 66, bank contact 69, conductor 79, relay 76, conductor 80, bank contact 67, wiper 64, working contact of arma- 59 and said armature, armature 51 and'its working contact upper winding of relay 34 to battery. Relay 34, commonly known as the back bridge or reversing relay, reverses the line conductors 30 and 32 as regards their connection with the line relay 35. Relay 76, on energizing, short circuits itself at its armature 77 with the result that said relay is rapidly energized and deenergized. The relay 75, due to its high impedance and the rapidly opening and closing of its circuit at armature 78, is adjusted so as to deenergize and open its contacts when relay 76 is rapidly vibrating. When the relay 7 5 deenergizes the falling away of armature 73 removes battery from the clock magnet 71 which allows said magnet to deenergize. The magnet 71 is deenergized in this manner so that the continuously rotating chart will not be torn by the armature of said magnet after it has punched the chart. The difference in potential across the conductors 79 and 80 caused by the relay 76 rapidly energizing and deenergizing, is reproduced in the receiver of the watchmans station A by which the watchman is informed that his call has been registered.

After the watchman is assured that his call has been registered the receiver is replaced on the switch hook and the circuit for the line relay is opened thereat with the result that the line switch C and connector H are released. When the line relay 35 deenergizes, the release relay 36 in turn deenergizes opens the holding circuit for the switching relay 14 of line switch C, and completes a circuit for the release magnet 44 through the off normal springs 7 O. The release magnet energizes and the connector H returns to its normal position.

The watchman repeats this operation, at all ofthe telephones in diiierent parts of the factory that are assigned for his use, with the result that a complete record of his rounds and the time he made them is accurately recorded on the chart of the time clock. i

It will be seen'therefore, that I have provided a very simple, economical and highly efiicient system of watchmans service, and one which is very flexible and also is very simply controlled from an existing telephone system. It will. also be seen that false recording, caused by the using of one of the telephones assigned to the night watchman by some person working overtime, has been eliminated, since no record is made unless the particular code number 00 is called, and the watchman is the only person who knows of or has occasion to use this number.

Having fullydescribed and ascertained the features and aspects of this invention, what I consider to be new and desire to have protected by Letters Patent will be pointed out in the appended claims.

What I claim is:

1. In a Watchmans supervisory system, a recording device adapted to record. the number of a calling telephone and the time at which the call is made, and means whereby the watchman making such a call is informed at the time said-call is completed that it has been recorded. g

2. In a watchmans supervisory system, a recording device adapted to record the number of a calling telephone and the time at which the call is made, and time controlled means common to a plurality of telephone lines whereby said recording device is made ineffective after a predetermined period.

All

ISO

3. In a watchmans supervisory system, a recording device adapted to record the number of a calling tclephonefand the time at which the call is made, means whereby the Watchman making such a call is intormed at the time said call is completed that it has been recorded, and time controlled means whereby said recording device is made ineffective after a predetermined period.

4:. In-combination with a telephone system having lines and automatic switches responsive to the dialing of a specified number to extend one of said lines to a specified connection, a recording clock mechanism common to only certain of said lines, a disc therefor graduated in hours and minutes and havinga circular space thereon for each of said certain lines, said disc intersected by lines representing thetime, a magnet for each circular space and a connection for the automatic switch individual toone of said certain lines whereby when said specified number is dialled from that line the magnet individual thereto is operated to mark said disc to indicate the line calling and the time of the call. 7

5. In combination with a telephone system having lines and automatic switches responsive to the dialing of a specified number to extend one of said lines to a specified connection, a recording clock mechanism common to only certain of said lines, a disc therefor graduated in hours and minutesand having a circular space thereon for each of said certain lines, said disc intersected by lines rep-' resenting the time, a magnet for each circular space and a connection from the automatic switch individual to one of said certain lines whereby when said specified number is dialled from that line the magnet in dividual thereto is operated to mark saiddisc to indicate the line calling and the time of the call,-and means whereby the person calling when said specified number is con nected with is informed that said call has been recorded.

6. In combination with a telephone system I having lines and automatic switches responsive to the dialing of a specified number to extend one of said lines to a specified connection, a recording clockmechanism common to only certain of said lines, a disc therefor graduated in hours and minutes and having a circular space thereon for each of said certain lines, said disc intersected by lines representing the'time, a magnet for each circular space and a connection from the automatic switch individual to one of said cercall'is completed to inform him that tain lines whereby when said specified numher is dialed from that'line the magnet individual thereto operated to mark said disc to indicate the llne calling and the time of.

the call, and time controlled means whereby further recording of calls is made inefiective after a predetermined period, p

7. In combination with a telephone system having lines and automatic switches responsive to the dialing of a specified number to V extend one of said lines to a specified connection, a recording clock mechanism common to only certain of-said lines, a disc therefor graduated in hours andminutes and having a circular space thereon for each of said certain lines, said disc intersected by lines representing the time, a magnet for each circular space and -'a connection from the automatic switch individual to one of said certain lines whereby whensaid specified number is dialled from that line the magnet individual thereto is operated to mark said disc to indicate the line calling and the time of the call, means whereby the,

watchman and the time at which the call is made, and means for giving the calling watchman an audible signal at the'time the has been recorded. r

' 9; In a watchmans supervisory system, a recording device adapted to record the number of any calling telephone in use by a watchman and the time at which thecall is made, and means for signalling the calling watchman over the .callingtelephone line at the call I the time the call is made to inform him that the call has been recorded.

10. .In awatchmans supervisory system, a recording device adapted to record the numberof a calling telephone and the time at which the call is made, a normally, enervgimd relay'for controlling said recording devlce, and means for COIltIOlllIIg sald relay to make said recording device ineffective after a'predetermined period.

In witness whereof, I hereunto subscribe my name this 8th day of March, A. D. 1922.

DONALD R. MIDDLETON. 

